Description
EPS (Electric power steering, Column assist type) system uses an electric
motor to assist the steering force and it is an engine operation independent
steering system.
EPS control module controls the motor operation according to information
received from the each sensor and CAN (Controller Area Network), resulting in
a more precise and timely control of steering assist than conventional engine-driven
hydraulic systems.
Components (Steering Angle Sensor, Torque Sensor, Fail-safe relay, etc.)
of the EPS system are located inside the steering column & EPS unit assembly
and the steering column & EPS unit assembly must not be disassemble to inspect
or replace them.
Notes With Regard To Diagnosis
Trouble factor
|
Check item
|
Trouble symtom
|
Explanation
|
Note
|
Drop, impact, and overload
|
Motor
|
Abnormal noise
|
| -
|
Visable or unvisable damage can occur.
The steering wheel could pull to one side by using the
dropped parts.
|
| -
|
Precise parts of motor/ECU are sensitive to vibration
and impact.
|
| -
|
Overload can cause unexpected damage
|
|
| -
|
Do not use the impacted EPS.
|
| -
|
Do not overload each parts.
|
|
ECU
|
Circuit damage
|
Torque sensor
|
Insufficient steering effort
|
Overload to INPUT shaft can cause malfunction of the torque sensor
|
| -
|
Do not impact the connecting parts (When inserting and
torquing)
|
| -
|
Use the specified tool to remove the steering wheel. (Do
not hammer on it)
|
| -
|
Do not use the impacted EPS
|
|
Shaft
|
Insufficient steering effort (Uneven between LH and RH)
|
|
Do not use the impacted EPS
|
Pull/Dent
|
Harness
|
| -
|
Malfunction-impossible power operation
|
|
Disconnection between harness connecting portion and harness
|
Do not overload the harness
|
Abnormal storage temperature
|
Motor/ECU
|
Abnormal steering effort by improper operation of the motor/ECU
|
| -
|
Waterproof at the normal condition
|
| -
|
Even a little moisture can cause malfunction of the precise
parts of the motor/ECU
|
|
| -
|
Keep the normal temperature and proper moisture, while
storaging
|
|
|
1. |
Do not impact the electronic parts, if they are dropped or impacted,
replace them with new ones.
|
|
2. |
Avoid heat and moisture to the electronic parts.
|
|
3. |
Do not contact the connect terminal to avoid deformation and static
electricity.
|
|
4. |
Do not impact the motor and torque sensor parts, if they are dropped
or impacted, replace them with new ones.
|
|
5. |
The connector should be disconnected or connected with IG OFF.
|
Hyundai Elantra HD: Description and Operation
